Upload to remote Maven repository (gradle uploadArchives) without specifying password

How do I upload to a remote Maven repository on my LAN without hard-coding a password into “build.gradle”?

“build.gradle” has the following (among other things):

apply plugin: 'maven'
configurations {
    deployerJars
}
dependencies {
    ...
    deployerJars "org.apache.maven.wagon:wagon-http:2.2+"
}
uploadArchives {
    repositories.mavenDeployer {
        configuration = configurations.deployerJars
        repository(url: "https://some.lan.host/repositories/snapshots") {
            authentication(userName: "myname", password: "password")
        }
    }
}

This works but would be a security problem because the project is hosted on a public code forge and the username and password would be publicly visible.

How can I upload without revealing secret information? I tried this:

dependencies {
    deployerJars "org.apache.maven.wagon:wagon-ssh:2.2+"
}
uploadArchives {
    repositories.mavenDeployer {
        configuration = configurations.deployerJars
        repository(url: "scp://some.lan.host/much/longer/path/due/to/use/of/nexus") {
            authentication(userName: "myname", privateKey: "/myhome/.ssh/id_rsa")
        }
    }
}

but it didn’t work.

Due to the Nexus server, I would prefer a solution that used the HTTP protocol.

Incidentally, the link org.apache.maven.artifact.ant.Authentication on this Gradle documentation webpage is broken. There are others.

...
authentication(userName: nexusUsername, password: nexusPassword)

Then specify these properties in ‘~/.gradle/gradle.properties’, or pass them on the command line (’-PnexusUsername=…’).

That’s the ticket!

Thanks!